From: yu-chang.lee <yu-chang.lee@mediatek.com>
To: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>,
Ulf Hansson <ulf.hansson@linaro.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>,
MandyJH Liu <mandyjh.liu@mediatek.com>
Cc: <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-pm@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>,
<Project_Global_Chrome_Upstream_Group@mediatek.com>,
<fan.chen@mediatek.com>, <xiufeng.li@mediatek.com>,
<yu-chang.lee@mediatek.com>
Subject: [PATCH v2 3/3] pmdomain: mediatek: support smi clamp protection
Date: Wed, 27 Mar 2024 13:57:32 +0800 [thread overview]
Message-ID: <20240327055732.28198-4-yu-chang.lee@mediatek.com> (raw)
In-Reply-To: <20240327055732.28198-1-yu-chang.lee@mediatek.com>
In order to avoid power glitch, this patch use smi clamp
to disable/enable smi common port.
Signed-off-by: yu-chang.lee <yu-chang.lee@mediatek.com>
---
drivers/pmdomain/mediatek/mt8188-pm-domains.h | 41 ++++++-
drivers/pmdomain/mediatek/mtk-pm-domains.c | 109 +++++++++++++-----
drivers/pmdomain/mediatek/mtk-pm-domains.h | 1 +
3 files changed, 115 insertions(+), 36 deletions(-)
diff --git a/drivers/pmdomain/mediatek/mt8188-pm-domains.h b/drivers/pmdomain/mediatek/mt8188-pm-domains.h
index 7bbba4d56a77..39f057dca92c 100644
--- a/drivers/pmdomain/mediatek/mt8188-pm-domains.h
+++ b/drivers/pmdomain/mediatek/mt8188-pm-domains.h
@@ -573,6 +573,18 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
.pwr_sta2nd_offs = 0x170,
.sram_pdn_bits = BIT(8),
.sram_pdn_ack_bits = BIT(12),
+ .bp_cfg = {
+ BUS_PROT_WR(SMI,
+ MT8188_SMI_COMMON_SMI_CLAMP_DIP_TO_VDO0,
+ MT8188_SMI_COMMON_CLAMP_EN_SET,
+ MT8188_SMI_COMMON_CLAMP_EN_CLR,
+ MT8188_SMI_COMMON_CLAMP_EN_STA),
+ BUS_PROT_WR(SMI,
+ MT8188_SMI_COMMON_SMI_CLAMP_DIP_TO_VPP1,
+ MT8188_SMI_COMMON_CLAMP_EN_SET,
+ MT8188_SMI_COMMON_CLAMP_EN_CLR,
+ MT8188_SMI_COMMON_CLAMP_EN_STA),
+ },
.reset_smi = {
SMI_RESET_WR(MT8188_SMI_LARB10_RESET,
MT8188_SMI_LARB10_RESET_ADDR),
@@ -585,7 +597,7 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
SMI_RESET_WR(MT8188_SMI_LARB15_RESET,
MT8188_SMI_LARB15_RESET_ADDR),
},
- .caps = MTK_SCPD_KEEP_DEFAULT_OFF,
+ .caps = MTK_SCPD_KEEP_DEFAULT_OFF | MTK_SCPD_CLAMP_PROTECTION,
},
[MT8188_POWER_DOMAIN_IPE] = {
.name = "ipe",
@@ -595,11 +607,18 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
.pwr_sta2nd_offs = 0x170,
.sram_pdn_bits = BIT(8),
.sram_pdn_ack_bits = BIT(12),
+ .bp_cfg = {
+ BUS_PROT_WR(SMI,
+ MT8188_SMI_COMMON_SMI_CLAMP_IPE_TO_VPP1,
+ MT8188_SMI_COMMON_CLAMP_EN_SET,
+ MT8188_SMI_COMMON_CLAMP_EN_CLR,
+ MT8188_SMI_COMMON_CLAMP_EN_STA),
+ },
.reset_smi = {
SMI_RESET_WR(MT8188_SMI_LARB12_RESET,
MT8188_SMI_LARB12_RESET_ADDR),
},
- .caps = MTK_SCPD_KEEP_DEFAULT_OFF,
+ .caps = MTK_SCPD_KEEP_DEFAULT_OFF | MTK_SCPD_CLAMP_PROTECTION,
},
[MT8188_POWER_DOMAIN_CAM_VCORE] = {
.name = "cam_vcore",
@@ -676,13 +695,20 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
.pwr_sta2nd_offs = 0x170,
.sram_pdn_bits = BIT(8),
.sram_pdn_ack_bits = BIT(12),
+ .bp_cfg = {
+ BUS_PROT_WR(SMI,
+ MT8188_SMI_COMMON_SMI_CLAMP_IPE_TO_VPP1,
+ MT8188_SMI_COMMON_CLAMP_EN_SET,
+ MT8188_SMI_COMMON_CLAMP_EN_CLR,
+ MT8188_SMI_COMMON_CLAMP_EN_STA),
+ },
.reset_smi = {
SMI_RESET_WR(MT8188_SMI_LARB16A_RESET,
MT8188_SMI_LARB16A_RESET_ADDR),
SMI_RESET_WR(MT8188_SMI_LARB17A_RESET,
MT8188_SMI_LARB17A_RESET_ADDR),
},
- .caps = MTK_SCPD_KEEP_DEFAULT_OFF,
+ .caps = MTK_SCPD_KEEP_DEFAULT_OFF | MTK_SCPD_CLAMP_PROTECTION,
},
[MT8188_POWER_DOMAIN_CAM_SUBB] = {
.name = "cam_subb",
@@ -692,13 +718,20 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
.pwr_sta2nd_offs = 0x170,
.sram_pdn_bits = BIT(8),
.sram_pdn_ack_bits = BIT(12),
+ .bp_cfg = {
+ BUS_PROT_WR(SMI,
+ MT8188_SMI_COMMON_SMI_CLAMP_CAM_SUBB_TO_VDO0,
+ MT8188_SMI_COMMON_CLAMP_EN_SET,
+ MT8188_SMI_COMMON_CLAMP_EN_CLR,
+ MT8188_SMI_COMMON_CLAMP_EN_STA),
+ },
.reset_smi = {
SMI_RESET_WR(MT8188_SMI_LARB16B_RESET,
MT8188_SMI_LARB16B_RESET_ADDR),
SMI_RESET_WR(MT8188_SMI_LARB17B_RESET,
MT8188_SMI_LARB17B_RESET_ADDR),
},
- .caps = MTK_SCPD_KEEP_DEFAULT_OFF,
+ .caps = MTK_SCPD_KEEP_DEFAULT_OFF | MTK_SCPD_CLAMP_PROTECTION,
},
};
diff --git a/drivers/pmdomain/mediatek/mtk-pm-domains.c b/drivers/pmdomain/mediatek/mtk-pm-domains.c
index 9ab6fa105c8c..2a86ff4bf23e 100644
--- a/drivers/pmdomain/mediatek/mtk-pm-domains.c
+++ b/drivers/pmdomain/mediatek/mtk-pm-domains.c
@@ -47,9 +47,10 @@ struct scpsys_domain {
struct clk_bulk_data *subsys_clks;
struct regmap *infracfg_nao;
struct regmap *infracfg;
- struct regmap *smi;
+ struct regmap **smi;
struct regmap **larb;
int num_larb;
+ int num_smi;
struct regulator *supply;
};
@@ -122,29 +123,19 @@ static int scpsys_sram_disable(struct scpsys_domain *pd)
MTK_POLL_TIMEOUT);
}
-static struct regmap *scpsys_bus_protect_get_regmap(struct scpsys_domain *pd,
- const struct scpsys_bus_prot_data *bpd)
-{
- if (bpd->flags & BUS_PROT_COMPONENT_SMI)
- return pd->smi;
- else
- return pd->infracfg;
-}
-
static struct regmap *scpsys_bus_protect_get_sta_regmap(struct scpsys_domain *pd,
const struct scpsys_bus_prot_data *bpd)
{
if (bpd->flags & BUS_PROT_STA_COMPONENT_INFRA_NAO)
return pd->infracfg_nao;
else
- return scpsys_bus_protect_get_regmap(pd, bpd);
+ return pd->infracfg;
}
static int scpsys_bus_protect_clear(struct scpsys_domain *pd,
- const struct scpsys_bus_prot_data *bpd)
+ const struct scpsys_bus_prot_data *bpd,
+ struct regmap *sta_regmap, struct regmap *regmap)
{
- struct regmap *sta_regmap = scpsys_bus_protect_get_sta_regmap(pd, bpd);
- struct regmap *regmap = scpsys_bus_protect_get_regmap(pd, bpd);
u32 sta_mask = bpd->bus_prot_sta_mask;
u32 expected_ack;
u32 val;
@@ -165,10 +156,9 @@ static int scpsys_bus_protect_clear(struct scpsys_domain *pd,
}
static int scpsys_bus_protect_set(struct scpsys_domain *pd,
- const struct scpsys_bus_prot_data *bpd)
+ const struct scpsys_bus_prot_data *bpd,
+ struct regmap *sta_regmap, struct regmap *regmap)
{
- struct regmap *sta_regmap = scpsys_bus_protect_get_sta_regmap(pd, bpd);
- struct regmap *regmap = scpsys_bus_protect_get_regmap(pd, bpd);
u32 sta_mask = bpd->bus_prot_sta_mask;
u32 val;
@@ -182,19 +172,32 @@ static int scpsys_bus_protect_set(struct scpsys_domain *pd,
MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
}
-static int scpsys_bus_protect_enable(struct scpsys_domain *pd)
+static int scpsys_clamp_bus_protection_enable(struct scpsys_domain *pd, bool is_smi)
{
+ int smi_count = 0;
+
for (int i = 0; i < SPM_MAX_BUS_PROT_DATA; i++) {
const struct scpsys_bus_prot_data *bpd = &pd->data->bp_cfg[i];
+ struct regmap *sta_regmap, *regmap;
+ bool is_smi = bpd->flags & BUS_PROT_COMPONENT_SMI;
int ret;
if (!bpd->bus_prot_set_clr_mask)
break;
+ if (is_smi) {
+ sta_regmap = pd->smi[smi_count];
+ regmap = pd->smi[smi_count];
+ smi_count++;
+ } else {
+ sta_regmap = scpsys_bus_protect_get_sta_regmap(pd, bpd);
+ regmap = pd->infracfg;
+ }
+
if (bpd->flags & BUS_PROT_INVERTED)
- ret = scpsys_bus_protect_clear(pd, bpd);
+ ret = scpsys_bus_protect_clear(pd, bpd, sta_regmap, regmap);
else
- ret = scpsys_bus_protect_set(pd, bpd);
+ ret = scpsys_bus_protect_set(pd, bpd, sta_regmap, regmap);
if (ret)
return ret;
}
@@ -202,19 +205,32 @@ static int scpsys_bus_protect_enable(struct scpsys_domain *pd)
return 0;
}
-static int scpsys_bus_protect_disable(struct scpsys_domain *pd)
+static int scpsys_clamp_bus_protection_disable(struct scpsys_domain *pd, bool is_smi)
{
+ int smi_count = pd->num_smi - 1;
+
for (int i = SPM_MAX_BUS_PROT_DATA - 1; i >= 0; i--) {
const struct scpsys_bus_prot_data *bpd = &pd->data->bp_cfg[i];
+ struct regmap *sta_regmap, *regmap;
+ bool is_smi = bpd->flags & BUS_PROT_COMPONENT_SMI;
int ret;
if (!bpd->bus_prot_set_clr_mask)
continue;
+ if (is_smi) {
+ sta_regmap = pd->smi[smi_count];
+ regmap = pd->smi[smi_count];
+ smi_count--;
+ } else {
+ sta_regmap = scpsys_bus_protect_get_sta_regmap(pd, bpd);
+ regmap = pd->infracfg;
+ }
+
if (bpd->flags & BUS_PROT_INVERTED)
- ret = scpsys_bus_protect_set(pd, bpd);
+ ret = scpsys_bus_protect_set(pd, bpd, sta_regmap, regmap);
else
- ret = scpsys_bus_protect_clear(pd, bpd);
+ ret = scpsys_bus_protect_clear(pd, bpd, sta_regmap, regmap);
if (ret)
return ret;
}
@@ -272,6 +288,12 @@ static int scpsys_power_on(struct generic_pm_domain *genpd)
bool tmp;
int ret;
+ if (MTK_SCPD_CAPS(pd, MTK_SCPD_CLAMP_PROTECTION)) {
+ ret = scpsys_clamp_bus_protection_enable(pd, true);
+ if (ret)
+ return ret;
+ }
+
ret = scpsys_regulator_enable(pd->supply);
if (ret)
return ret;
@@ -318,7 +340,13 @@ static int scpsys_power_on(struct generic_pm_domain *genpd)
if (ret < 0)
goto err_disable_subsys_clks;
- ret = scpsys_bus_protect_disable(pd);
+ if (MTK_SCPD_CAPS(pd, MTK_SCPD_CLAMP_PROTECTION)) {
+ ret = scpsys_clamp_bus_protection_disable(pd, true);
+ if (ret)
+ return ret;
+ }
+
+ ret = scpsys_clamp_bus_protection_disable(pd, false);
if (ret < 0)
goto err_disable_sram;
@@ -332,7 +360,7 @@ static int scpsys_power_on(struct generic_pm_domain *genpd)
return 0;
err_enable_bus_protect:
- scpsys_bus_protect_enable(pd);
+ scpsys_clamp_bus_protection_enable(pd, false);
err_disable_sram:
scpsys_sram_disable(pd);
err_disable_subsys_clks:
@@ -353,7 +381,13 @@ static int scpsys_power_off(struct generic_pm_domain *genpd)
bool tmp;
int ret;
- ret = scpsys_bus_protect_enable(pd);
+ if (MTK_SCPD_CAPS(pd, MTK_SCPD_CLAMP_PROTECTION)) {
+ ret = scpsys_clamp_bus_protection_enable(pd, true);
+ if (ret)
+ return ret;
+ }
+
+ ret = scpsys_clamp_bus_protection_enable(pd, false);
if (ret < 0)
return ret;
@@ -450,12 +484,23 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no
if (IS_ERR(pd->infracfg))
return ERR_CAST(pd->infracfg);
- smi_node = of_parse_phandle(node, "mediatek,smi", 0);
- if (smi_node) {
- pd->smi = device_node_to_regmap(smi_node);
- of_node_put(smi_node);
- if (IS_ERR(pd->smi))
- return ERR_CAST(pd->smi);
+ pd->num_smi = of_count_phandle_with_args(node, "mediatek,smi", NULL);
+ if (pd->num_smi > 0) {
+ pd->smi = devm_kcalloc(scpsys->dev, pd->num_smi, sizeof(*pd->smi), GFP_KERNEL);
+ if (!pd->smi)
+ return ERR_PTR(-ENOMEM);
+
+ for (i = 0; i < pd->num_smi; i++) {
+ smi_node = of_parse_phandle(node, "mediatek,smi", i);
+ if (!smi_node)
+ return ERR_PTR(-EINVAL);
+
+ pd->smi[i] = device_node_to_regmap(smi_node);
+ if (IS_ERR(pd->smi[i]))
+ return ERR_CAST(pd->smi[i]);
+ }
+ } else {
+ pd->num_smi = 0;
}
pd->num_larb = of_count_phandle_with_args(node, "mediatek,larb", NULL);
diff --git a/drivers/pmdomain/mediatek/mtk-pm-domains.h b/drivers/pmdomain/mediatek/mtk-pm-domains.h
index 31c2a1bb500f..e0eb7214719e 100644
--- a/drivers/pmdomain/mediatek/mtk-pm-domains.h
+++ b/drivers/pmdomain/mediatek/mtk-pm-domains.h
@@ -13,6 +13,7 @@
#define MTK_SCPD_EXT_BUCK_ISO BIT(6)
#define MTK_SCPD_HAS_INFRA_NAO BIT(7)
#define MTK_SCPD_STRICT_BUS_PROTECTION BIT(8)
+#define MTK_SCPD_CLAMP_PROTECTION BIT(9)
#define MTK_SCPD_CAPS(_scpd, _x) ((_scpd)->data->caps & (_x))
#define SPM_VDE_PWR_CON 0x0210
--
2.18.0
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prev parent reply other threads:[~2024-03-27 5:58 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-27 5:57 [PATCH v2 0/3] pmdomain: mediatek: solve power domain glitch issue yu-chang.lee
2024-03-27 5:57 ` [PATCH v2 1/3] pmdomain: mediatek: add smi_larb_reset function when power on yu-chang.lee
2024-03-27 5:57 ` [PATCH v2 2/3] dt-bindings: power: Add mediatek larb definition yu-chang.lee
2024-03-27 8:39 ` Krzysztof Kozlowski
2024-03-27 9:23 ` Krzysztof Kozlowski
2024-03-27 9:34 ` Yu-chang Lee (李禹璋)
2024-03-27 9:59 ` Krzysztof Kozlowski
2024-03-27 10:39 ` Yu-chang Lee (李禹璋)
2024-03-27 10:43 ` Krzysztof Kozlowski
2024-03-27 10:56 ` Yu-chang Lee (李禹璋)
2024-03-27 11:04 ` Krzysztof Kozlowski
2024-03-27 11:55 ` Alexandre Mergnat
2024-03-28 6:06 ` Yu-chang Lee (李禹璋)
2024-03-28 8:44 ` Krzysztof Kozlowski
2024-04-04 10:02 ` Ulf Hansson
2024-03-28 7:03 ` Yu-chang Lee (李禹璋)
2024-03-27 10:01 ` Yu-chang Lee (李禹璋)
2024-03-27 10:10 ` Krzysztof Kozlowski
2024-03-27 9:01 ` Rob Herring
2024-03-31 15:02 ` kernel test robot
2024-03-27 5:57 ` yu-chang.lee [this message]
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